L83 to L86 intake swap

[Tech89]

Thinking about doing the L86 intake swap on my 2018 L83. My question: is the tune an absolute MUST? what are the consequences of no tune? CEL?

[pokismoki]

the problem we have is our l83 TB's only open 83%, so the point of the swap is to install either the 6.2 TB or a ZR1 95MM TB. this will compensate for the lack of 100% opening of the STOCK TB . yes you need to install the 6.2 manifold to use the big TB's

 

Edited August 15, 2021 by pokismoki

[pokismoki]

 

[CamGTP]

Are you getting that 83% from what you see on your scanner or from it actually opening?

 

HP Tuners for example has the TPS channel stop at 83-84% but you can log other channels to see the opening amount.

[pokismoki]

i will have to mount my camera towards the TB and shoot a video to confirm its actually not opening 100%, this is what all three of my scanners show 83% on the tps, one is cheapo TOrque app, then and autozone scanner, the HPtuners software. the tech at tuning school says this is correct for our trucks.

[CamGTP]

Yeah, that specific channel in just about all scanners will stop at 83-84%. Been that way since 2007.5 in the GEN 4 trucks and whenever they started using the E67 computer in cars.